Designed for non-emissions 289, 302, and 351-Windsor Ford engines. Maximum performance in the 1500-6500 rpm range for high performance street applications. 1.90 intake valves are for use with stock pistons and high-flow 2.02 intake valves work with pistons notched for valve clearance. Will not accept rail rockers. 289-302 V8's require head bolt bushing #9680 and either head bolt kit #8552 (7/16) or stock bolts.
Designed for non-emissions 289, 302, and 351-Windsor Ford engines. Maximum performance in the 1500-6500 rpm range for high performance street applications. 1.90 intake valves are for use with stock pistons and high-flow 2.02 intake valves work with pistons notched for valve clearance. Will not accept rail rockers. 289-302 V8's require head bolt bushing #9680 and either head bolt kit #8552 (7/16) or stock bolts.